Jens and Notch fixed a ton of bugs between the pre-release and the release, [including](https://twitter.com/#!/jeb_/status/113289341761093632):

> * SSP chunk memory leak
* Mineshaft density (half now)
* Increased stronghold count to 3 per map instead of one
* Furnace tile entity crash
* Crafting bench ghost items
* Vines (and leaves) crash in nether
* Use item animation in SMP (blocking and eating)
* Blocking in SMP
* Sprinting with right-click or sneaking
* Added some blocks to creative mode
* Fixed dropping items
* Nothing can be eaten in creative mode
* Enderman client-side problems
* Chicken and cow drop burned food
* Squids drop exp
* 1.7 worlds should get structures
* Farmlands rejecting melon and pumpkin seeds
* Bonemeal on melons and pumpkins
* Bonemeal on mushroom only works on dirt or grass
* Added item drops for cracked and mossy smooth stone brick
* Adjusted fog strength at low positions

Changes reported by Jens on Twitter:

* [Fixed experience orb excessive spawning bug in SMP](https://twitter.com/#!/jeb_/status/113343037215752192)
* [Made cave spider poison scale with difficulty](https://twitter.com/#!/jeb_/status/113670924443729920)
* [Nerfed sprinting speed](https://twitter.com/#!/jeb_/status/113729246588964864)
* [Fog toggle key 'F' re-added, then removed, then re-added again as 'F3' + 'F'](https://twitter.com/#!/jeb_/status/113879474193432576)
* [Fixed crash when adding too many items to a double-chest in SMP](https://twitter.com/#!/jeb_/status/113890800957530113)

Changes reported by Notch on Twitter:

* ["Tweaked" Endermen](https://twitter.com/#!/notch/status/113639625364480001) (this potentially refers to [the change in eye color and particle effect](https://gaming.stackexchange.com/q/30383/3389) for Endermen in the final release)
* [Fixed issue with holding down right-click to place multiple blocks](https://twitter.com/#!/notch/status/113657465438089216)
* [Nerfed vine growth](https://twitter.com/#!/notch/status/113547746585214976)
* [Two unnamed fixes and two unnamed tweaks](https://twitter.com/#!/notch/status/113534302238687232)